Finding the Fourth Proportional to 56,535.57, 78,022.59 and 31,385.07

Step by Step Solution

1. Step 1: Write the proportion equation
   56,535.57 : 78,022.59 = 31,385.07 : x
2. Step 2: Convert to fraction form
   56,535.57/78,022.59 = 31,385.07/x
3. Step 3: Cross multiply
   56,535.57x = 78,022.59 × 31,385.07
4. Step 4: Simplify right side
   56,535.57x = 2,448,744,448.73
5. Step 5: Solve for x
   x = 2,448,744,448.73/56,535.57
6. Step 6: Final answer
   x = 43,313.34